Clutch



April 22, 1930. o, R, HUMPHREYS ET AL 1,755,259

CLUTCH Filed July 25; 1927 2 Sheets-Sheet 1 O.R.Humphreys WGHumphreys II attozm',

Patented Apr. 22, 1 930 om AR R. HUMPHREYSTANJWALTE'R G; HUMIEHREYS, onQuanta, NEBRASKA cnuron 7 Application nd'Jul' as, 1927. Serial No.207,930.

" The present invention relates to clutches,

and more particularly to clutches which may be usedin hoisting devicesor thejlike. N

An object of the present invention is to-pro- 5 vide a clutchofthistypewhich will take hold gradually but positively; 1 7 I i c Another objectofthis invention 1s to provide a device in whichthe locking mechanis'mwill rotate therewith; c

. A further object of this invention isto pro- ,vide a device which willreadily respond to whichjmay be mounted on ahshift orrelease lever19.The'lever 19 may be pivoted at its "lower end inany suitable manner, andthe the action ofthe operator. l-

advantag'esfof thisinvention will: in part be described in and in partbe understood from the following detailed description of the T presentpreferrediembodiment, the samebe- V ihg-illustrated inv the accompanying-draw-f is vings,wherein: is

' Fig.1 is adetailed end elevation of a clutch "constructed accordingftothe :present invention, and 1 x i 1 E 1 Fig. 2 is a sectional view ofthe same taken substantially through the center thereof;- 1

Referring to, the drawings, and firs't to Fig. 2, the. numeral 1designates a' shaft which I may be connected to a driven member, and adisc wheelj3 having a hub 2is mounted on the shaft 1. The disc 3 has aflange 4 extend- 39 inginwardly therefrom, and the hub .2 is

provided with a keyway 5 in which a key 6 is adapted to fit for holdingthe wheel 3 in -close engagement on the-shaft 1.

the inner end of the sleeve 7 is preferably adapted to partiallytelescope the outer end of the sleeve 2. The sleeve 7 is provided at Theabove'randvarlous other objectsand an annular slot '14: which isprovidedin the 1 otwo-part block 15 15" about the; outer end ofthe-sleeve 7 A forcer ring or block having'complementary halves15: and15 are secured together by bolts1 6 and 16 or thelike; I33 2 Theforcerring-or block isadapted to engage fth'e thrust'ring 13 at the peripherythereof. 'fThe block 15 15"is further provided with a pair of oppositelugs 17Jand 17',which have cavities or recesses-18 and, 18 respectively69 for the receptlon of sultable fulcrum: PIES upper end of theflever isfr'ee'to bemoved either forwardly or rearwardly. 3 The movemento fthelever 19 will carry with it the ring15--15V which'willjmovethe sleeve 7in the desired direction, e

the outer end of the hub ,20 abuts the inner end of the hub 2 on disc 3.A pin22 is secured in thelrim of vthe gear wheel 21 and extends ,7

outwardly-therefrom, and; a; lever 24 having a head or hearing 23 isadapted t'ol be pivotally mounted on saidpin 22; sai'd lever 24; beingretained on said pinbya lock-washer 25 and the lock washer; 25 beheld inposition bya cotter pin 26 or the like. "A 'coil springk V 28 is securedat one end to saidlever24c intermediate the ends thereof and the'opp'osite end of the coil spring 28 is secured insaid V A slidable sleeve 7is loosely mounted on 3 theshaftl' outwardly from the hub 2, and

arm 11 in anyysuitable-manner; The lever 24 at {its lower end has a'fork29 which is F "mounted in-said -fork 29 one pin 31; The

its inner end with a flange 8 towhich anan f 1 nular disc 9-is securelyfastened in any suitable manner. The brakedisc 9 is provided I with aring brake lining 10 which is secured to the inner face of the disc 9 inany suitable manner; The sleeve 7 is provided ad- V jacent the inner endthereof with a'pair of arms 11 and 12 which are shown in detail onFig.1, and the purposes of these arms will be later described in detail;i V

' Adjacent the outer end of the sleeve 7 an annularthrust 'ring 131 isadapted to seat in v pivotally mounted on saidpin34 between; the

opposite end of the link 30 is pivotally secured to the arm 12 bya Pin32. I 1 a I The head 23 of the lever 24 is provided with a pair ofoutstanding spaced lugs 27 and:27

which have thereinapertures 33 .and33 for r receiving therein: a pin 34.A clutch band '38 having a friction lining 39secured to the innersurface thereof in any. suitable manner V is provided with ajbail 36. Adra-W'bolt35' isisecured to said-bail 36 by nuts 37 orfthe like, andtheopposite end of thebolt 35' is.

spaced lugs 27 and 27', The opposite open end of the clutch band 38 isprovided with a loop 40, and a pin 41, which is securely fastened to therim of the gear Wheel 21, is adapted to holdsaid loop 40 in desiredposition.

A plurality, of outstanding lugs are mounted on said gearwheel 21. Thelugs 42 are provided with adjusting screws 43 having lock nuts 44and'sliding plates 45. The lugs.

42 provide support for the clutch band 38. The gear wheel 21 may bedriven from any suitable source of power supply, and for this purpose apinion 46is provided which may: be mounted on a shaft 47. It is ofcourse understood that the size of the pinion may be varied to suit theparticular case. V

In operation the rotation of the pinion 46 in the direction indicated bythe arrow will rotate the gear wheel 21 in the direction indicated bythe arrow, and with the movement of the gear wheel 21 the lever24,whi'ch is mounted on pin 22, and the sleeve 7 will rotate therewith.It is of course understood that the lever 24 is connected to said sleeve7 through the connecting link 30, and the rotation of the lever 24 aboutthe shaft 1 will carry with it the sleeve 7. With the sleeve 7 in motionthe handle or lever-19 may be thrust forward thus bringing thebrakelining 10 into contact or engagement with the disc 3. Owing to thelengths of the lever 24 and the link 30there is "suflicient lateral playin the connection between these members to admit of the relativelyslight shifting of the sleeve 7, which movement amounts to little morethan a pressure through the sleeve to the brake lining 10.

It will'be understood that when the lever 19 is moved in a direction tocause the sleeve 7 to move toward the disc 3 and assuming that said discis not rotating at this time, i

clutch band upon the flange 4 of the disc 3,

whereupon said disc will becomelocked with the sleeve 7 and coincidentlywith the gear or pulley wheel 21, these last mentioned parts beingthereby caused to rotate in unison for transmitting power.

The movement of the sleeve 7 and the rotation of the lever 24 about theshaft 1 forces 29 ofthe lever outwardly, and this outward movementforces the draw bolt 35 to moveforward thus contracting the clutch band38 or flange 4. When the .lever 19 is moved backwardly the sleeve 7 willfollow, carrying with it the disc 9 with its brake lining 10 which willmove out of engagement with the disc 3. The coil spring 28 will thenforce the lever 24 to move backwardly thusexpanding the clutch band 38and releasing the dr-um 4.

It is of course understood that various changes and modifications may bemade in the details of'construction and design of the above specificallydescribed embodiment of the invention without departing from the spiritthereof, such changes and modifications,

of said sleeve and being adapted for engage-V ment with the outerend ofsaid drum when the sleeve is moved forwardly, an outstanding, pinmounted in said gear wheel, a lever pivoted on said pin, a pair ofoutstanding arms on said slidable sleeve, a connecting link forconnecting the outer end of said lever to one of said outstanding arms,a spring secured at one end of said lever intermediate the ends thereofand at the opposite end to the otherof said outstanding arms, and clutchmeans surrounding said drum, means for connecting said clutch means andsaid lever, said spring being adapted to normally urge said leverinwardly whereby to expand said clutch means and release the same fromthe drum. 7 r e In testimony whereof, we have afiixed our signatures. vi

OMAR R.-HUMPHREYS. V WALTER G. HUMPI-IREYS.

' the connecting link 30 to push the lower end and the friction lining39 will grip thedrum

